Re: [Help-bash] How to terminate the main process when error arises in process substitution?

[Greg Wooledge]

On Mon, Apr 22, 2013 at 04:40:06PM -0500, Peng Yu wrote:
> function error {
> echo Hello
> return 1
> }
> echo xx <(error || exit $?)
> echo $?

You can't "exit" the main script from within a background command, which
is what a process substitution is.  If you want to check the exit status
of a background job and then react to it, you need to abandon the
process substitution syntax and do things manually.

trap 'rm -f myfifo' EXIT
mkfifo myfifo
mybackgroundjob > myfifo & pid=$!
myforegroundjob < myfifo
wait $pid || { echo "aborting: background job failed" >&2; exit 1; }
echo "I did not abort"